Guidelines for Initial Shoring Or Securing of Damaged Buildings Following Earthquake PDF Download
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Author:
Publisher:
ISBN:
Category : Buildings
Languages : en
Pages : 207
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Author:
Publisher:
ISBN:
Category : Buildings
Languages : en
Pages : 207
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Book Description
Author: U. s. Department of Homeland Security
Publisher: Createspace Independent Publishing Platform
ISBN: 9781484117330
Category : Social Science
Languages : en
Pages : 224
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Book Description
The Federal Emergency Management Agency (FEMA), which is part of the Department of Homeland Security, works to reduce the ever-increasing cost that disasters inflict on the nation. Preventing losses before they occur by designing and constructing buildings and their components to withstand anticipated forces from various hazards is one of the key components of mitigation and is one of the most effective ways of reducing the cost of future disasters. The National Earthquake Hazards Reduction Program (NEHRP) is the federal program established to address the nation's earthquake threat. NEHRP seeks to resolve two basic issues: how will earthquakes affect us and how do we best apply our resources to reduce their impact on our nation. The program was established by Congress under the Earthquake Hazards Reduction Act of 1977 (Public Law 95-124) and was the result of years of examination of the earthquake hazard and possible mitigation measures. Under the NEHRP, FEMA is responsible for supporting program implementation activities, including the development, publication, and dissemination of technical design and construction guidance documents. Generally, there has not been much technical guidance addressing residential buildings unless they are located in areas of high seismicity or exceed a certain size or height. This is because most residential buildings were thought to perform fairly well in earthquakes due to their low mass and simple construction. While buildings may not normally experience catastrophic collapse, they can still suffer significant amounts of damage, rendering them uninhabitable. This is especially true when construction techniques are less than adequate. What is particularly important from FEMA's point of view is that, given the sheer number of this type of building, even minor damage represents a significant loss potential and temporary housing demand that will need to be addressed after an earthquake by all levels of government. This guide provides information on current best practices for earthquake-resistant house design and construction for use by builders, designers, code enforcement personnel, and potential homeowners. It incorporates lessons learned from the 1989 Loma Prieta and 1994 Northridge earthquakes as well as knowledge gained from the FEMA-funded CUREE-Caltech Woodframe Project. It also introduces and explains the effects of earthquake loads on one- and two-family detached houses and identifies the requirements of the 2003 International Residential Code (IRC) intended to resist these loads. The stated purpose of the IRC is to provide: “… minimum requirements to safeguard the public safety, health, and general welfare, through affordability, structural strength, means of egress facilities, stability, sanitation, light and ventilation, energy conservation and safety to life and property from fire and other hazards attributed to the built environment.” Because the building code requirements are minimums, a house and its contents still may be damaged in an earthquake even if it was designed and built to comply with the code. Research has shown, however, that earthquake damage to a house can be reduced for a relatively small increase in construction cost. This guide identifies above-code techniques for improving earthquake performance and presents an estimate of their cost. Note that the information presented in this guide is not intended to replace the IRC or any applicable state or local building code, and the reader is urged to consult with the local building department before applying any of the guidance presented in this document. The information presented in this guide applies only to one- and two-family detached houses constructed using the nonengineered prescriptive construction provisions of the IRC. Applicable IRC limits on building configuration and construction are described.
Author: Federal Emergency Agency
Publisher: FEMA
ISBN:
Category :
Languages : en
Pages : 72
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Following the two damaging California earthquakes in1989 (Loma Prieta) and 1994 (Northridge), many concrete wall and masonry wall buildings were repaired using federal disaster assistance funding. The repairs were based on inconsistent criteria, giving rise to controversy regarding criteria for the repair of cracked concrete and masonry wall buildings. To help resolve this controversy, the Federal Emergency Management Agency (FEMA) initiated a project on evaluation and repair of earthquake-damaged concrete and masonry wall buildings in 1996. The ATC-43 project addresses the investigation and evaluation of earthquake damage and discusses policy issues related to the repair and upgrade of earthquake-damaged buildings. The project deals with buildings whose primary lateral-force-resisting systems consist of concrete or masonry bearing walls with flexible or rigid diaphragms, or whose vertical-load-bearing systems consist of concrete or steel frames with concrete or masonry infill panels. The intended audience is design engineers, building owners, building regulatory officials, and government agencies. The project results are reported in three documents. TheFEMA306report, Evaluation of Earthquake Damaged Concrete and Masonry Wall Buildings, Basic Procedures Manual, provides guidance on evaluating damage and analyzing future performance. Included in the document are component damage classification guides, and test and inspection guides. FEMA 307, Evaluation of Earthquake Damaged Concrete and Masonry Wall Buildings, Technical Resources, contains supplemental information including results from a theoretical analysis of the effects of prior damage on single-degree-of-freedom mathematical models, additional background information on the component guides, and an example of the application of the basic procedures. FEMA 308, The Repair of Earthquake Damaged Concrete and Masonry Wall Buildings ,discusses the policy issues pertaining to the repair of earthquake-damaged buildings and illustrates how the procedures developed for the project can be used to provide a technically sound basis for policy decisions. It also provides guidance for the repair of damaged components.
Author: Roy W. Harthorn
Publisher: Roy Harthorn
ISBN: 9780967078106
Category : Architecture
Languages : en
Pages : 36
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Author:
Publisher:
ISBN:
Category : Buildings
Languages : en
Pages : 356
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Author: Stuart D. Werner
Publisher: ASCE Publications
ISBN: 9780784474426
Category : Technology & Engineering
Languages : en
Pages : 386
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Book Description
Seismic Guidelines for Ports was prepared by the Ports Committee of the Technical Council on Lifeline Earthquake Engineering of the American Society of Civil Engineers, a committee of experienced professionals for port authorities, government, consulting engineering firms, and the academic community. This volume includes lessons of experience form past earthquakes; a summary of current state of knowledge and practice of risk reduction planning through design, analysis and material components; and guidelines for response and recovery at ports.
Author: U. s. Department of Homeland Security
Publisher: Createspace Independent Publishing Platform
ISBN: 9781484199749
Category : Social Science
Languages : en
Pages : 386
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Book Description
The goal of the “Provisions” is to present criteria for the design and construction of new structures subject to earthquake ground motions in order to minimize the hazard to life for all structures, to increase the expected performance of structures having a substantial public hazard due to occupancy or use as compared to ordinary structures, and to improve the capability of essential facilities to function after an earthquake. The “Provisions” provides the minimum criteria considered prudent for the protection of life safety in structures subject to earthquakes. The “Provisions” document has been reviewed extensively and balloted by the architectural, engineering, and construction communities and, therefore, it is a proper source for the development of building codes in areas of seismic exposure. Some design standards go further than the “Provisions” and attempt to minimize damage as well as protect building occupants. The “Provisions” document generally considers property damage as it relates to occupant safety for ordinary structures. For high occupancy and essential facilities, damage limitation criteria are more strict in order to better provide for the safety of occupants and the continued functioning of the facility. Some structural and nonstructural damage can be expected as a result of the “design ground motions” because the “Provisions” allow inelastic energy dissipation in the structural system. For ground motions in excess of the design levels, the intent of the Provisions is for the structure to have a low likelihood of collapse. It must be emphasized that absolute safety and no damage even in an earthquake event with a reasonable probability of occurrence cannot be achieved for most structures. However, a high degree of life safety, albeit with some structural and nonstructural damage, can be achieved economically in structures by allowing inelastic energy dissipation in the structure. The objective of the “Provisions” therefore is to set forth the minimum requirements to provide reasonable and prudent life safety. For most structures designed and constructed according to the “Provisions,” it is expected that structural damage from even a major earthquake would likely be repairable, but the damage may not be economically repairable. Where damage control is desired, the design must provide not only sufficient strength to resist the specified seismic loads but also the proper stiffness to limit the lateral deflection. Damage to nonstructural elements may be minimized by proper limitation of deformations; by careful attention to detail; and by providing proper clearances for exterior cladding, glazing, partitions, and wall panels. The nonstructural elements can be separated or floated free and allowed to move independently of the structure. If these elements are tied rigidly to the structure, they should be protected from deformations that can cause cracking; otherwise, one must expect such damage. It should be recognized, however, that major earthquake ground motions can cause deformations much larger than the specified drift limits in the “Provisions.” Where prescribed wind loading governs the stress or drift design, the resisting system still must conform to the special requirements for seismic-force-resisting systems. This is required in order to resist, in a ductile manner, potential seismic loadings in excess of the prescribed loads. A proper, continuous load path is an obvious design requirement for equilibrium, but experience has shown that it often is overlooked and that significant damage and collapse can result. The basis for this design requirement is twofold: 1. To ensure that the design has fully identified the seismic-force-resisting system and its appropriate design level and 2. To ensure that the design basis is fully identified for the purpose of future modifications or changes in the structure.
Author: Federal Emergency Agency
Publisher: FEMA
ISBN:
Category :
Languages : en
Pages : 392
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Book Description
Earthquakes in the United States are regional in their occurrence and while California is famous for its earthquake other states, such as Texas, have much less concern for the threat of temblors. However, architectural practice is becoming increasingly national and global, and the architect in Texas may find that the next project is in California. Thus it has become necessary for the professional architect to have some knowledge of the earthquake problem and how design seeks to control it. Designing for Earthquakes: a Manual for Architects is intended to explain the principles of seismic design for those without a technical background in engineering and seismology. The primary intended audience is that of architects, and includes practicing architects, architectural students and faculty in architectural schools who teach structures and seismic design. For this reason the text and graphics are focused on those aspects of seismic design that are important for the architect to know. Because of its non-technical approach this publication will also be useful to anyone who has an interest and concern for the seismic protection of buildings, including facility managers, building owners and tenants, building committee participants, emergency service personnel and building officials. Engineers and engineering students will also gain from this discussion of seismic design from an architectural viewpoint. The principles discussed are applicable to a wide range of building types, both new and existing. The focus is on buildings that are designed by a team that includes architects, engineers and other consultants.
Author:
Publisher:
ISBN:
Category : Buildings
Languages : en
Pages : 170
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Author: Japan Building Disaster Prevention Association
Publisher:
ISBN:
Category : Building, Iron and steel
Languages : ja
Pages : 111
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